4072111271021 has 4 divisors (see below), whose sum is σ = 4072498033500. Its totient is φ = 4071724508544.

The previous prime is 4072111270973. The next prime is 4072111271051. The reversal of 4072111271021 is 1201721112704.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1412439548521 + 2659671722500 = 1188461^2 + 1630850^2 .

It is a cyclic number.

It is not a de Polignac number, because 4072111271021 - 2¹⁰ = 4072111269997 is a prime.

It is a super-2 number, since 2×4072111271021² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4072111271051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193365446 + ... + 193386503.

It is an arithmetic number, because the mean of its divisors is an integer number (1018124508375).

Almost surely, 2^{4072111271021} is an apocalyptic number.

It is an amenable number.

4072111271021 is a deficient number, since it is larger than the sum of its proper divisors (386762479).

4072111271021 is a wasteful number, since it uses less digits than its factorization.

4072111271021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386762478.

The product of its (nonzero) digits is 1568, while the sum is 29.

Adding to 4072111271021 its reverse (1201721112704), we get a palindrome (5273832383725).

The spelling of 4072111271021 in words is "four trillion, seventy-two billion, one hundred eleven million, two hundred seventy-one thousand, twenty-one".